Make Unichars compile and run on Ruby 1.9.

I'm not sure why you would want to use Unichars on 1.9 because 1.9's encoding
support is good enough and certainly a lot faster than Unichars.

Tip of the hat to: crishoj.

.gitignore

@@ -5,5 +5,6 @@ Makefile
 *.dll
 pkg
 doc
+html
 .DS_Store
 *.log

ext/glib/glib.c

@@ -1,6 +1,14 @@
 #include <ruby.h>
 #include <glib.h>
 
+#ifndef RSTRING_LEN
+#define RSTRING_LEN(string) RSTRING(string)->len
+#endif
+
+#ifndef RSTRING_PTR
+#define RSTRING_PTR(string) RSTRING(string)->ptr
+#endif
+
 /*
  *  call-seq:
  *    utf8_size(string)
@@ -14,7 +22,7 @@ static VALUE utf8_size(VALUE self, VALUE string)
   VALUE result;
 
   Check_Type(string, T_STRING);
-  result = ULONG2NUM(g_utf8_strlen(StringValuePtr(string), RSTRING(string)->len));
+  result = ULONG2NUM(g_utf8_strlen(StringValuePtr(string), RSTRING_LEN(string)));
 
   return result;
 }
@@ -33,7 +41,7 @@ static VALUE utf8_upcase(VALUE self, VALUE string)
   gchar *temp;
 
   Check_Type(string, T_STRING);
-  temp = g_utf8_strup(StringValuePtr(string), RSTRING(string)->len);
+  temp = g_utf8_strup(StringValuePtr(string), RSTRING_LEN(string));
   result = rb_str_new2(temp);
   free(temp);
 
@@ -54,7 +62,7 @@ static VALUE utf8_downcase(VALUE self, VALUE string)
   gchar *temp;
 
   Check_Type(string, T_STRING);
-  temp = g_utf8_strdown(StringValuePtr(string), RSTRING(string)->len);
+  temp = g_utf8_strdown(StringValuePtr(string), RSTRING_LEN(string));
   result = rb_str_new2(temp);
   free(temp);
 
@@ -75,7 +83,7 @@ static VALUE utf8_reverse(VALUE self, VALUE string)
   gchar *temp;
 
   Check_Type(string, T_STRING);
-  temp = g_utf8_strreverse(StringValuePtr(string), RSTRING(string)->len);
+  temp = g_utf8_strreverse(StringValuePtr(string), RSTRING_LEN(string));
   result = rb_str_new2(temp);
   free(temp);
 
@@ -114,10 +122,10 @@ static VALUE utf8_normalize(VALUE self, VALUE string, VALUE form)
   } else if (ID2SYM(rb_intern("kc")) == form) {
     mode = G_NORMALIZE_NFKC;
   } else {
-    rb_raise(rb_eArgError, "%s is not a valid normalization form, options are: :d, :kd, :c, or :kc", RSTRING(rb_inspect(form))->ptr);
+    rb_raise(rb_eArgError, "%s is not a valid normalization form, options are: :d, :kd, :c, or :kc", RSTRING_PTR(rb_inspect(form)));
   }
 
-  temp = g_utf8_normalize(StringValuePtr(string), RSTRING(string)->len, mode);
+  temp = g_utf8_normalize(StringValuePtr(string), RSTRING_LEN(string), mode);
   result = rb_str_new2(temp);
   free(temp);
 

lib/chars.rb

@@ -9,9 +9,15 @@ class Chars
   alias to_s wrapped_string
   alias to_str wrapped_string
 
-  # Creates a new Chars instance by wrapping _string_.
-  def initialize(string)
-    @wrapped_string = string
+  if 'string'.respond_to?(:force_encoding)
+    # Creates a new Chars instance by wrapping _string_.
+    def initialize(string)
+      @wrapped_string = string.dup.force_encoding(Encoding::UTF_8)
+    end
+  else
+    def initialize(string) #:nodoc:
+      @wrapped_string = string.dup
+    end
   end
 
   # Forward all undefined methods to the wrapped string.
@@ -42,7 +48,7 @@ def respond_to?(method, include_private=false)
   def <=>(other)
     @wrapped_string <=> other.to_s
   end
-
+  
   # Returns a new Chars object containing the _other_ object concatenated to the string.
   #
   # Example:

test/profile/memory.rb

@@ -3,7 +3,7 @@
 $:.unshift(File.expand_path('../../../ext/glib', __FILE__))
 $:.unshift(File.expand_path('../../../lib', __FILE__))
 
-$KCODE = 'UTF8'
+$KCODE = 'UTF8' unless 'string'.respond_to?(:encoding)
 
 require 'unichars'
 

test/test_helper.rb

@@ -3,7 +3,7 @@
 $:.unshift(File.expand_path('../../ext/glib', __FILE__))
 $:.unshift(File.expand_path('../../lib', __FILE__))
 
-$KCODE = 'UTF8'
+$KCODE = 'UTF8' unless 'string'.respond_to?(:encoding)
 
 require 'rubygems' rescue LoadError
 require 'test/spec'